Its very funny in you answering asking that statement. Its a good topic to discuss. At times, that thought comes across my mind; other times, I hear older people saying they are briging the world into the church. However, we have to look into the true meaning of music and how our playing and musical selections will enhance an edify our worship services. We can ask is music "sin"? No. I dont think its the music. Music itself is music. To me its like energy; it can not be created or destoryed. The notes are the same like if I were to play a selection in the key of A flat in the church and then play in one of Michael Jackson's song in A flat, four flats in A flat scale doesn't change.
Another thing, during praise services, the music is at an upbeat, high volume, and very intensified (focusing on the music rhythm )...the members are dancing, rolling on the floor, juming, crying, lifting up hands, and giving the highest praises to God, could one call that worldly music or church music. On the otherhand, If play at a BB King concert and people are doing the same thing, there. Could one call that worldly music or church music? So I must conclude that there is no such thing as worldly music, but there is a such thing as taking music and transforming it to the world standpoint.
So to all musicians play to the glory of God where He may bless the church through your playing.
I hope this will be an aid in answering your question.